package com.nowcoder.nowcodercommunity.controller;

import com.nowcoder.nowcodercommunity.entity.*;
import com.nowcoder.nowcodercommunity.event.EventProducer;
import com.nowcoder.nowcodercommunity.service.CommentService;
import com.nowcoder.nowcodercommunity.service.DiscussPostService;
import com.nowcoder.nowcodercommunity.service.LikeService;
import com.nowcoder.nowcodercommunity.service.UserService;
import com.nowcoder.nowcodercommunity.util.CommunityConstant;
import com.nowcoder.nowcodercommunity.util.CommunityUtil;
import com.nowcoder.nowcodercommunity.util.HostHolder;
import com.nowcoder.nowcodercommunity.util.RedisKeyUtil;
import org.apache.catalina.Host;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.*;

@Controller
@RequestMapping("/discuss")
public class DiscussPostController implements CommunityConstant {
    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private CommentService commentService;

    @Autowired
    private UserService userService;

    @Autowired
    private LikeService likeService;

    @Autowired
    private HostHolder hostHolder;

    @Autowired
    private EventProducer eventProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @RequestMapping(path = "/add",method = RequestMethod.POST)
    @ResponseBody
    public String addDiscussPost(String title,String content){
        User user=hostHolder.getUser();
        if(user == null){
            return CommunityUtil.getJSONString(403,"你还没有登录！");
        }

        DiscussPost post=new DiscussPost();
        post.setUserId(user.getId());
        post.setTitle(title);
        post.setContent(content);
        post.setCreateTime(new Date());

        discussPostService.addDiscussPost(post);

        // 触发发帖事件
        Event event=new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(user.getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(post.getId());
        eventProducer.fireEvent(event);

        // 计算帖子分数
        String redisKey= RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey,post.getId());

        //报错的情况将来统一处理
        return CommunityUtil.getJSONString(0,"发布成功！");

    }

    @RequestMapping(path = "/detail/{discussPostId}",method = RequestMethod.GET)
    public String getDiscussPost(@PathVariable("discussPostId") int discussPostId, Model model, Page page){
        //帖子
        DiscussPost post=discussPostService.findDiscussPostById(discussPostId);
        model.addAttribute("post",post);
        //作者
        User user=userService.findUserById(post.getUserId());
        model.addAttribute("user",user);
        //点赞数量
        long likeCount=likeService.findEntityLikeCount(ENTITY_TYPE_POST,discussPostId);
        model.addAttribute("likeCount",likeCount);
        //点赞状态
        int likeStatus=hostHolder.getUser() == null? 0:likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_POST,discussPostId);
        model.addAttribute("likeStatus",likeStatus);

        //评论的分页信息
        page.setLimit(5);
        page.setPath("/discuss/detail/"+discussPostId);
        page.setRows(post.getCommentCount());

        //评论：给帖子的评论
        //回复：给评论的评论
        //评论列表
        List<Comment> commentList=commentService.findCommentsByEntity(ENTITY_TYPE_POST,post.getId(),page.getOffset(),page.getLimit());
        //评论的VO列表
        List<Map<String,Object>> commentVoList=new ArrayList<>();
        if(commentList != null){
            for (Comment comment : commentList) {
                //评论的VO
                Map<String, Object> commentVo = new HashMap<>();
                //添加评论
                commentVo.put("comment",comment);
                //添加作者
                commentVo.put("user",userService.findUserById(comment.getUserId()));
                //点赞数量
                likeCount=likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT,comment.getId());
                commentVo.put("likeCount",likeCount);
                //点赞状态
                likeStatus=hostHolder.getUser() == null? 0:likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_COMMENT,comment.getId());
                commentVo.put("likeStatus",likeStatus);

                //回复列表
                List<Comment> replyList=commentService.findCommentsByEntity(ENTITY_TYPE_COMMENT,comment.getId(),0,Integer.MAX_VALUE);
                //回复的VO列表
                List<Map<String,Object>> replyVoList=new ArrayList<>();
                if(replyList != null){
                    for (Comment reply : replyList) {
                        Map<String,Object> replyVo=new HashMap<>();
                        //回复
                        replyVo.put("reply",reply);
                        //作者
                        replyVo.put("user",userService.findUserById(reply.getUserId()));
                        //回复目标
                        User target=reply.getTargetId() ==0? null:userService.findUserById(reply.getTargetId());
                        replyVo.put("target",target);
                        //点赞数量
                        likeCount=likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT,reply.getId());
                        replyVo.put("likeCount",likeCount);
                        //点赞状态
                        likeStatus=hostHolder.getUser() == null? 0:likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_COMMENT,reply.getId());
                        replyVo.put("likeStatus",likeStatus);

                        replyVoList.add(replyVo);
                    }
                }
                commentVo.put("replys",replyVoList);
                // 回复数量
                int replyCount=commentService.findCommentCount(ENTITY_TYPE_COMMENT,comment.getId());
                commentVo.put("replyCount",replyCount);

                commentVoList.add(commentVo);
            }
        }

        model.addAttribute("comments",commentVoList);
        return "/site/discuss-detail";
    }

    // 置顶
    @RequestMapping(path = "/top",method = RequestMethod.POST)
    @ResponseBody
    public String setTop(int id){
        discussPostService.updateType(id,1);

        // 触发发帖事件
        Event event=new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);



        return CommunityUtil.getJSONString(0);
    }

    // 加精
    @RequestMapping(path = "/wonderful",method = RequestMethod.POST)
    @ResponseBody
    public String setWonderful(int id){
        discussPostService.updateStatus(id,1);

        // 触发发帖事件
        Event event=new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);

        // 计算帖子分数
        String redisKey= RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey,id);

        return CommunityUtil.getJSONString(0);
    }

    // 删除
    @RequestMapping(path = "/delete",method = RequestMethod.POST)
    @ResponseBody
    public String setDelete(int id){
        discussPostService.updateStatus(id,2);

        // 触发删帖事件
        Event event=new Event()
                .setTopic(TOPIC_DELETE)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);

        return CommunityUtil.getJSONString(0);
    }
}
